The Onslow Water and Sewer Authority (ONWASA) is a government entity that provides water and sewer services (wastewater) to the unincorporated areas of Onslow County which includes areas outside of the town limits of Jacksonville, all of the Town of Holly Ridge, Town of Swansboro, Town of Richlands, as well as the Town of North Topsail Island, North Carolina.

ONWASA currently provides water to approximately 56 percent of the County population.

ONWASA's Board of Directors is the trustee for the water and sewer system of Onslow County with complete authority and control of the management and operation of the Utility, in accordance with NC General Statutes and subsequent bond ordinances.  The Board adopts the annual budget; sets rates, fees and charges based on cost-of-service principles; approves bond issues to fund capital projects; makes policy decisions; and appoints the Executive Director, General Counsel and independent auditor.

The services we provide are funded from water and sewer rates and fees which come from monthly bills. We do not receive property taxes, sales taxes, etc. We occasionally receive State or Federal grants for special purposes such as purchases of infrastructure and facilities. 

ONWASA's administrative and customer service office is at 228 Georgetown Road, Jacksonville, NC. Our normal business hours are Monday through Friday from 8:00 a.m. to 5:00 p.m. (except holidays).